Split rim and rim operating device



July 30, 1935. A. MoLDENl-IAUER SPLIT RIM AND RIM OPERATING DEVICE FiledJuly e, 1951 INVENT u a wmvw ATTORNEY Patented July 30, 1935 fum-TEDvvSTA'TES PATENT- o-FFICE SPLIT RIMi RIM OPERATING`DEVICE ArnoldMoldenhauer, Milwaukee, Wis. 'Application-July s, 1931, serial No.'548,879

` somme. (CL-301935) E andl 'I upon the split ring II bya simple rfel'a`This 'invention' relatesto improvements in split rims andrim operatingdevices. y

It is the objectof the-'invention to; provide a novel andimproved"'split'rlm comprising a pair 6 ofriikerperipneralbead-rmembers, a connect-ing band, an interlocking means adapted foroperation in allocking 4direction by a relative axial movement of thepartsarid in an unlocking ldirection by a relativerotativeimovement ofthe parts. it is my further object' to yprovide a rim` which may beunlocked and separation of its component parts eected lby asimpleAmanipulation l.of a convenient operatinglever.

`In the drawing:

Figure 1 is zairagmentary A'idetail in cross section" through' aportion. of a `splitl 'rim embodying the' invention. l

Figure 24 is a fragmentary*detaily kviewin plan i, ci .a portion oi the'split' ring employed to unite the componentbead elementsiof the rim.

Figure is a view on a reduced scale showing in `perspective fthe .threecomponent partsofthe rim as 'theyzappear'when separated.

"Figure'4 is afragmontary ieiaii in-pIan-snowf ing" theunlocking'movementeffected by manipulatiomoffthecontrol lever. i

Figure 5 is a view similar to y the" application of the control leveryfor separating thejparts in an axial'zdirection.

Likepartsare identified by thel same reference characters throughoutthe'severarviews The'rim, comprises two component'bea-d elements'. 6 and 1havingbea'd portions" 8' land 9 reiraipiane of me -rim.A'rho-aiijooenivjmarginal portions' 10 ofthe two-:bead elements farelradially formed toiprovideachannel 'into which the "split ring IIliszreceivable. l i i Each of thebead elements lin andI I 'isprovided at'intervalsabout the peripheryA of its yradially inwardly formed;` portionI 'with 'T-'shaped slots I2 openingto-th'e margins. "I'hesplit-ringvllcarries complementary vinterlocking "bosses g I5 :i which are similarin'form' to a: figure H,-ea`ch-'half 4U'of which is, receivabley intooneofithe'slots I2 of oneoithe'bead elements; The complementary surfacesof the bosses I5 and slots I2 are all beveled as shown at I6 in Fig. 2with the exception of those surfaces which oppose an axial separation ofthe interlocked parts. Thus, the margins I1 of the boss, and thecorresponding margins of the slots, are disposed in radial planes normalto the axis of the rim.

Because of the beveled surfaces provided at I6 it is possible toassemble the bead elements Figure '4 shovvlng spectively andperipherally joined upon the cen` tive axial movement of the parts. Withthe slots in registry with the bosses of the split ring las shown inFig. 3, the initial entering movement ofthe marginal portions I of thebead elements spreads the split ring -until complete registrationbetween the bosses and slots is eilected, Where upon the bosses dropinto the rslots `and the'split ring resilifently closes to cover thejoint andpro-ir tect` the casing and tube from becoming pinchedAtherein.

Due to the right angle shoulders at Il on the bosses, however, vthe rimparts cannot be sepa.- rated by relative axial movement until thelbossesare `iirst released by a radial movement from interlocking engagementinthe respectiveslots;y This is preferably accomplishedby relative rota"tion' of the parts as shown in Fig. 4. Al control lever IIIA isfulcrumed on a pin projecting at I9 frombead Uelement 'I, and a slot20'in the leverisL engagedl over a second pin 2| *in bead element 16.'I'hereupon the movement of the lever` from the fou imo positioniiiusiraied in Fig. 4 to the dotted line positionin that Viewv willcause relative pre-lripheral rotation of Irirn element 6 from its 11111line position to its dotted line position. 1 The manipulation of loverls iuusiiaiodin" Fig; 4 brings pins I9 and 2D directly opposite oneanother Thereupon the lever is inverted on pin Illas shownin Fig. 5,andits cam-like 4surface 'at 22 is engaged behind pin 2I so thatWhen'thelever is again moved from full to dotted line positions shown inFig. 5 it will exert anaxial thrust on` rim element 6 to separate therims by movement to the relative positions shown indotted lines,

Y While the split ring I I maybe .made in one piece if desired, I preferto make it up in a number of sectors as shown in Fig. 3, each sectorcarl-y rying one of the bosses I5 and being free to spring radially atthe end to which the boss isoap'plied, The other end of the sector maythen be fastened by rivets 25 or Welded or otherwise, secured to thebead elementi. the rivets being'` shown in Fig.,

1 and the holes 26 thereforinli'gli. 'The' rear son for preferably'dividinglthe'yring' II intosecf tors'is "torender more `symmetrical theradial same radial yielding movement as each other part and the ease ofoperation of the device is enhanced.

As shown, the arrangement is such that the spring arms which comprisesectors of the split ring Il must yield outwardly of the rim toward thecasing and tube in order to permit the locking devices l5 to release thecomponent parts of the rim. Thus when the inner tube is inated, itspressure resists the release of the locking devices, but when the tubeis deflated the locking devices are readily manipulated.

Iclaim:

1. A split rim comprising circumferentially united bead elements and asplit ring telescopically related to said bead elements, said ring andelements having complementary interlocking parts arranged in pairs, onepart in each pair being radially yieldable and said parts havingcomplementary portions beveled to cause the yielding of one part ofeachy pair upon a peripheral rotation of a bead element respecting saidar-` scopically related thereto, each of said bead elements having slotsabout their margins complementary to the slots of the other element andsaid ring having bosses complementary to said slots, the complementarysurfaces of said bosses and said margins being engageable in the courseof relative axial movement of said elements toward each other and beingbeveled in a rotativeA direction respecting each other, and thecomplementary portions of said bosses and slots engageable in oppositionto the axial separation of said elements being abruptly shouldered.

3. A split rim comprising the combination with annular bead elements, ofa split ring comprising arcuate sections overlapping said elernents'andvsecured at their ends to one of said elements, interlocking meanscarried bythe free ends of said sectors, and means on the other of saidelements with which the respective interlocking means are engageable,said interlocking means and said other elements having complementaryportions resisting axial separation of said elements and adapted todisplace said interlocking means in a radial direction upon relativerotative movement between said elements and. upon relative axialmovement of said elements, to-

Ward each other. v f

4. In a split rim, the combinationfwith a pair of complementary annularbead elements each provided with an annular cylindrical portion adjacentthe cylindrical portion of the other element and radially formed toprovide Ian annular depression upon the said cylindrical portions,

said cylindrical portions having complementary T-shaped slots in saiddepression comprising H- shaped slots when in registry, of a split ringcomprising a plurality of arcuate sections disposed end to end in saiddepression and each having a portion secured to one of said elements andone end disposed above an adjacent H-shaped slot and freely movableradially therefrom, and an H-shaped boss en each of said sectionsreceivable in said H-shaped slots, whereby said annular bead elementsmay be detachably secured together.

5. In a split rim, the combination with a pair of complementary annularbead elements each provided with an annular cylindricalportion adjacentthe cylindrical portion of the other element and radially formed toprovide an annular depression upon the said cylindrical portions, saidcylindrical portions having complementary T-shaped slots in saiddepression comprising H- vshaped slots when in registry, of a split ringcomprising a plurality of arcuate sections disposed end to end in saiddepression and each having a portion secured to one of said elements andone end disposed above an adjacent H-shaped slot and freely movableradially therefrom, and an H-shaped boss on each of said sectionsyreceivable in said H-shaped slots, whereby said annular bead elementsmay be detachably secured together,

said H-shaped slots and bosseshaving comple-v mentary beveled edgesserving as cam surfaces and complementary radially disposed surfacesvserving as locking faces, whereby rotation of the annular bead elementsrelative to each other will remove the H-shaped bosses from the H-shapedslots and whereby when the bosses are disposed in the slots, axialmovement of the annular bead' elements relative to eachother will beprevented.

6. yA rim comprisingthe combination with 'annular bead elements havingabutting marginsv and oilset toward the center of the rim adjacent saidmargins, each of said elements having'a lock engaging recess near saidmargins, of a locking device engageable in both of said recesses forthe' connection of said bead elements, and an arm carrying said lockingdevice and extending circumferentially of said bead elements upon theoiset portions thereof and connected at its'end with one of said beadelements, whereby disengagement of said locking devicewill be Opposed bythe pressure of a tire mounted on said rim.

7. A split rim comprising a pair of annular bead elements havingtireengaging flanges extending outwardly and provided between lsaid flangeswith` rim portions designed for substansaid yieldable means beingpositioned to be covered by a tire applied to said rim, whereby theinflation of such a tire will Oppose the release' of said locking means.V

ARNOLD MOLDENHAUER.

